diff --git a/core/redis_cache.py b/core/redis_cache.py
index 71a384c4..4df2770c 100644
--- a/core/redis_cache.py
+++ b/core/redis_cache.py
@@ -24,7 +24,12 @@ async def _get_redis() -> Any | None:
 
     try:
         redis_from_url = import_module("redis.asyncio").from_url
-        client = redis_from_url(REDIS_URL, encoding="utf-8", decode_responses=True)
+        client = redis_from_url(
+            REDIS_URL,
+            encoding="utf-8",
+            decode_responses=True,
+            max_connections=64,
+        )
         await client.ping()
         _REDIS_CLIENT = client
         return _REDIS_CLIENT
diff --git a/database/notifications.py b/database/notifications.py
index eebd858f..0b9c8e59 100644
--- a/database/notifications.py
+++ b/database/notifications.py
@@ -1,3 +1,4 @@
+from collections import defaultdict
 from datetime import datetime, timedelta
 
 from sqlalchemy import and_, delete, func, select, tuple_
@@ -47,6 +48,43 @@ async def delete_notification(session: AsyncSession, tg_id: int, notification_ty
     logger.debug(f"🗑 Уведомление {notification_type} для пользователя {tg_id} удалено")
 
 
+async def bulk_add_notifications(
+    session: AsyncSession, items: list[tuple[int, str]], *, commit: bool = False
+) -> None:
+    """Один запрос: вставка/обновление многих (tg_id, notification_type). Без commit, если commit=False."""
+    if not items:
+        return
+    now = datetime.utcnow()
+    stmt = insert(Notification).values(
+        [
+            {"tg_id": tg_id, "notification_type": ntype, "last_notification_time": now}
+            for tg_id, ntype in items
+        ]
+    ).on_conflict_do_update(
+        index_elements=[Notification.tg_id, Notification.notification_type],
+        set_={"last_notification_time": now},
+    )
+    await session.execute(stmt)
+    if commit:
+        await session.commit()
+    logger.info(f"✅ Bulk: добавлено/обновлено {len(items)} уведомлений")
+
+
+async def bulk_delete_notifications(
+    session: AsyncSession, items: list[tuple[int, str]], *, commit: bool = False
+) -> None:
+    """Один запрос: удаление многих (tg_id, notification_type). Без commit, если commit=False."""
+    if not items:
+        return
+    stmt = delete(Notification).where(
+        tuple_(Notification.tg_id, Notification.notification_type).in_(items)
+    )
+    await session.execute(stmt)
+    if commit:
+        await session.commit()
+    logger.debug(f"🗑 Bulk: удалено {len(items)} уведомлений")
+
+
 async def check_notification_time(session: AsyncSession, tg_id: int, notification_type: str, hours: int = 12) -> bool:
     stmt = select(Notification.last_notification_time).where(
         Notification.tg_id == tg_id, Notification.notification_type == notification_type
@@ -135,6 +173,34 @@ async def get_last_notification_times_bulk(
     return out
 
 
+_HOT_LEAD_NOTIFICATION_TYPES = (
+    "hot_lead_step_1",
+    "hot_lead_step_2",
+    "hot_lead_step_3",
+    "hot_lead_step_2_expired",
+)
+
+
+async def get_hot_lead_notification_flags(
+    session: AsyncSession, tg_ids: list[int]
+) -> dict[int, set[str]]:
+    """
+    Один запрос: для каждого tg_id возвращает множество типов уведомлений hot_lead_*,
+    которые у него уже есть. Используется в notify_hot_leads для устранения N+1.
+    """
+    if not tg_ids:
+        return {}
+    stmt = select(Notification.tg_id, Notification.notification_type).where(
+        Notification.tg_id.in_(tg_ids),
+        Notification.notification_type.in_(_HOT_LEAD_NOTIFICATION_TYPES),
+    )
+    result = await session.execute(stmt)
+    out = defaultdict(set)
+    for tg_id, ntype in result.all():
+        out[tg_id].add(ntype)
+    return dict(out)
+
+
 async def check_hot_lead_discount(session: AsyncSession, tg_id: int) -> dict:
     try:
         result = await session.execute(
diff --git a/database/tariffs.py b/database/tariffs.py
index bbe1b7ed..f06f43a4 100644
--- a/database/tariffs.py
+++ b/database/tariffs.py
@@ -253,6 +253,32 @@ async def check_tariff_exists(session: AsyncSession, tariff_id: int):
         return False
 
 
+async def get_vless_enabled(session: AsyncSession, tariff_id: int | None) -> bool:
+    """Возвращает, включён ли VLESS у тарифа (по кэшированному get_tariff_by_id)."""
+    if not tariff_id:
+        return False
+    tariff = await get_tariff_by_id(session, int(tariff_id))
+    if not tariff:
+        return False
+    return bool(tariff.get("vless"))
+
+
+async def get_vless_enabled_batch(
+    session: AsyncSession, tariff_ids: list[int]
+) -> dict[int, bool]:
+    """
+    Один запрос: для списка tariff_id возвращает dict[tariff_id -> vless].
+    Использовать в списках ключей вместо N вызовов get_vless_enabled.
+    """
+    if not tariff_ids:
+        return {}
+    unique_ids = list(dict.fromkeys(tariff_ids))
+    result = await session.execute(
+        select(Tariff.id, Tariff.vless).where(Tariff.id.in_(unique_ids))
+    )
+    return {row[0]: bool(row[1]) for row in result.all()}
+
+
 async def get_tariff_sort_order(session: AsyncSession, tariff_id: int) -> int:
     try:
         result = await session.execute(select(Tariff.sort_order).where(Tariff.id == tariff_id))
diff --git a/handlers/admin/coupons/coupons_handler.py b/handlers/admin/coupons/coupons_handler.py
index 9d60f9ff..f34b57e8 100644
--- a/handlers/admin/coupons/coupons_handler.py
+++ b/handlers/admin/coupons/coupons_handler.py
@@ -17,7 +17,7 @@ from config import INLINE_MODE, USERNAME_BOT
 from database import create_coupon, delete_coupon, get_all_coupons
 from filters.admin import IsAdminFilter
 from handlers.buttons import BACK
-from handlers.utils import format_days
+from handlers.utils import format_days, safe_answer_inline_query
 from logger import logger
 
 from ..panel.keyboard import AdminPanelCallback, build_admin_back_kb
@@ -432,7 +432,8 @@ async def inline_coupon_handler(inline_query: InlineQuery, session: Any):
     coupon = next((c for c in coupons["coupons"] if c["code"] == coupon_code), None)
 
     if not coupon:
-        await inline_query.answer(
+        await safe_answer_inline_query(
+            inline_query,
             results=[],
             switch_pm_text="Купон не найден",
             switch_pm_parameter="coupons",
@@ -442,7 +443,8 @@ async def inline_coupon_handler(inline_query: InlineQuery, session: Any):
 
     percent_value = coupon.get("percent")
     if percent_value is not None and int(percent_value) > 0:
-        await inline_query.answer(
+        await safe_answer_inline_query(
+            inline_query,
             results=[],
             switch_pm_text="Процентные купоны не публикуются ссылкой",
             switch_pm_parameter="coupons",
@@ -485,4 +487,4 @@ async def inline_coupon_handler(inline_query: InlineQuery, session: Any):
         reply_markup=builder.as_markup(),
     )
 
-    await inline_query.answer(results=[result], cache_time=86400, is_personal=True)
+    await safe_answer_inline_query(inline_query, results=[result], cache_time=86400, is_personal=True)
diff --git a/handlers/keys/key_mode/key_cluster_mode.py b/handlers/keys/key_mode/key_cluster_mode.py
index c7c32408..f2c5779c 100644
--- a/handlers/keys/key_mode/key_cluster_mode.py
+++ b/handlers/keys/key_mode/key_cluster_mode.py
@@ -33,11 +33,11 @@ from handlers.buttons import (
     TV_BUTTON,
 )
 from handlers.keys.operations import create_key_on_cluster
+from database import get_vless_enabled
 from handlers.tariffs.tariff_display import (
     build_key_created_message,
     get_effective_limits_for_key,
     resolve_price_to_charge,
-    resolve_vless_enabled,
 )
 from handlers.utils import (
     edit_or_send_message,
@@ -202,9 +202,9 @@ async def key_cluster_mode(
     vless_enabled = False
     try:
         if plan:
-            vless_enabled = await resolve_vless_enabled(session, plan)
+            vless_enabled = await get_vless_enabled(session, plan)
         elif key_record.get("tariff_id"):
-            vless_enabled = await resolve_vless_enabled(session, key_record["tariff_id"])
+            vless_enabled = await get_vless_enabled(session, key_record["tariff_id"])
     except Exception:
         vless_enabled = False
 
diff --git a/handlers/keys/key_view.py b/handlers/keys/key_view.py
index 01afe332..ae35eacc 100644
--- a/handlers/keys/key_view.py
+++ b/handlers/keys/key_view.py
@@ -52,6 +52,7 @@ from handlers.buttons import (
     TV_BUTTON,
     UNFREEZE,
 )
+from database import get_vless_enabled_batch
 from handlers.tariffs.tariff_display import GB, get_key_tariff_addons_state
 from handlers.texts import (
     DAYS_LEFT_MESSAGE,
@@ -70,6 +71,7 @@ from handlers.utils import (
     format_minutes,
     get_russian_month,
     is_full_remnawave_cluster,
+    safe_answer_callback,
 )
 from hooks.hook_buttons import insert_hook_buttons
 from hooks.processors import (
@@ -153,6 +155,16 @@ async def build_keys_response(records: list[Key] | None, session: AsyncSession,
         end = start + page_size
         page_records = records[start:end]
 
+        tariff_ids = []
+        for record in page_records:
+            tid = getattr(record, "tariff_id", None)
+            if tid is not None:
+                try:
+                    tariff_ids.append(int(tid))
+                except (TypeError, ValueError):
+                    pass
+        vless_by_tariff = await get_vless_enabled_batch(session, tariff_ids) if tariff_ids else {}
+
         for record in page_records:
             alias = record.alias
             email = record.email
@@ -167,14 +179,8 @@ async def build_keys_response(records: list[Key] | None, session: AsyncSession,
             else:
                 formatted_date_full = "без срока действия"
 
-            is_vless = False
-            if getattr(record, "tariff_id", None):
-                try:
-                    from handlers.tariffs.tariff_display import resolve_vless_enabled
-
-                    is_vless = await resolve_vless_enabled(session, int(record.tariff_id))
-                except Exception:
-                    is_vless = False
+            tid = getattr(record, "tariff_id", None)
+            is_vless = vless_by_tariff.get(int(tid), False) if tid is not None else False
 
             icon = "📶" if is_vless else "🔑"
 
@@ -232,7 +238,7 @@ async def handle_rename_key(callback: CallbackQuery, state: FSMContext, session:
     client_id = callback.data.split("|")[1]
     key_row = (await session.execute(select(Key).where(Key.client_id == client_id))).scalar_one_or_none()
     if not key_row or key_row.tg_id != callback.from_user.id:
-        await callback.answer("Доступ запрещён.", show_alert=True)
+        await safe_answer_callback(callback, "Доступ запрещён.", show_alert=True)
         return
     await state.set_state(RenameKeyState.waiting_for_new_alias)
     await state.update_data(client_id=client_id)
@@ -289,7 +295,7 @@ async def process_callback_view_key(callback_query: CallbackQuery, session: Asyn
     key_name = callback_query.data.split("|")[1]
     record = await get_key_details(session, key_name)
     if not key_owned_by_user(record, callback_query.from_user.id):
-        await callback_query.answer("Доступ запрещён.", show_alert=True)
+        await safe_answer_callback(callback_query, "Доступ запрещён.", show_alert=True)
         return
     image_path = os.path.join("img", "pic_view.jpg")
     await render_key_info(callback_query.message, session, key_name, image_path)
@@ -489,20 +495,20 @@ async def handle_reset_hwid(callback_query: CallbackQuery, session: AsyncSession
 
     record = await get_key_details(session, key_name)
     if not record:
-        await callback_query.answer("❌ Ключ не найден.", show_alert=True)
+        await safe_answer_callback(callback_query, "❌ Ключ не найден.", show_alert=True)
         return
     if not key_owned_by_user(record, callback_query.from_user.id):
-        await callback_query.answer("Доступ запрещён.", show_alert=True)
+        await safe_answer_callback(callback_query, "Доступ запрещён.", show_alert=True)
         return
 
     client_id = record.get("client_id")
     if not client_id:
-        await callback_query.answer("❌ У ключа отсутствует client_id.", show_alert=True)
+        await safe_answer_callback(callback_query, "❌ У ключа отсутствует client_id.", show_alert=True)
         return
 
     remna_api_url = await resolve_remnawave_api_url(session, str(record.get("server_id") or ""), fallback_any=True)
     if not remna_api_url:
-        await callback_query.answer("❌ Remnawave-сервер не найден.", show_alert=True)
+        await safe_answer_callback(callback_query, "❌ Remnawave-сервер не найден.", show_alert=True)
         return
 
     async def _reset_devices(api):
@@ -523,7 +529,7 @@ async def handle_reset_hwid(callback_query: CallbackQuery, session: AsyncSession
         timeout_sec=12.0,
     )
     if reset_result is None:
-        await callback_query.answer("❌ Авторизация в Remnawave не удалась.", show_alert=True)
+        await safe_answer_callback(callback_query, "❌ Авторизация в Remnawave не удалась.", show_alert=True)
         return
 
     total, deleted = reset_result
@@ -534,9 +540,9 @@ async def handle_reset_hwid(callback_query: CallbackQuery, session: AsyncSession
         fallback_any=True,
     )
     if total == 0:
-        await callback_query.answer("✅ Устройства не были привязаны.", show_alert=True)
+        await safe_answer_callback(callback_query, "✅ Устройства не были привязаны.", show_alert=True)
     else:
-        await callback_query.answer(f"✅ Устройства сброшены ({deleted})", show_alert=True)
+        await safe_answer_callback(callback_query, f"✅ Устройства сброшены ({deleted})", show_alert=True)
 
     if await process_after_hwid_reset(
         chat_id=callback_query.from_user.id,
diff --git a/handlers/notifications/general_notifications.py b/handlers/notifications/general_notifications.py
index 79228ba9..635926e5 100644
--- a/handlers/notifications/general_notifications.py
+++ b/handlers/notifications/general_notifications.py
@@ -26,6 +26,8 @@ from config import (
 from core.bootstrap import MODES_CONFIG, NOTIFICATIONS_CONFIG
 from database import (
     add_notification,
+    bulk_add_notifications,
+    bulk_delete_notifications,
     check_notification_time,
     check_notification_time_bulk,
     check_notifications_bulk,
@@ -144,34 +146,51 @@ async def preload_notification_data(session: AsyncSession) -> dict[str, Any]:
 
 async def execute_bulk_updates(session: AsyncSession, bulk_updates: dict[str, Any]) -> None:
     try:
-        if bulk_updates["balance_changes"]:
-            for tg_id, balance_change in bulk_updates["balance_changes"].items():
-                await session.execute(
-                    text("UPDATE users SET balance = balance + :change WHERE tg_id = :tg_id"),
-                    {"change": balance_change, "tg_id": tg_id},
+        balance_changes = bulk_updates.get("balance_changes") or {}
+        if balance_changes:
+            tg_ids = list(balance_changes.keys())
+            changes = [balance_changes[tg_id] for tg_id in tg_ids]
+            await session.execute(
+                text(
+                    "UPDATE users SET balance = balance + v.change FROM "
+                    "(SELECT unnest(CAST(:tg_ids AS bigint[])) AS tg_id, unnest(CAST(:changes AS double precision[])) AS change) AS v "
+                    "WHERE users.tg_id = v.tg_id"
+                ),
+                {"tg_ids": tg_ids, "changes": changes},
+            )
+            logger.info(f"Bulk: обновлено {len(balance_changes)} балансов")
+
+        key_expiry = bulk_updates.get("key_expiry_updates") or []
+        if key_expiry:
+            await session.run_sync(
+                lambda sync_sess: sync_sess.bulk_update_mappings(
+                    Key,
+                    [{"client_id": cid, "expiry_time": exp} for cid, exp in key_expiry],
                 )
-            logger.info(f"Bulk: обновлено {len(bulk_updates['balance_changes'])} балансов")
+            )
+            logger.info(f"Bulk: обновлено {len(key_expiry)} сроков действия ключей")
 
-        if bulk_updates["key_expiry_updates"]:
-            for client_id, new_expiry in bulk_updates["key_expiry_updates"]:
-                await session.execute(update(Key).where(Key.client_id == client_id).values(expiry_time=new_expiry))
-            logger.info(f"Bulk: обновлено {len(bulk_updates['key_expiry_updates'])} сроков действия ключей")
+        key_tariff = bulk_updates.get("key_tariff_updates") or []
+        if key_tariff:
+            await session.run_sync(
+                lambda sync_sess: sync_sess.bulk_update_mappings(
+                    Key,
+                    [{"client_id": cid, "tariff_id": tid} for cid, tid in key_tariff],
+                )
+            )
+            logger.info(f"Bulk: обновлено {len(key_tariff)} тарифов ключей")
 
-        if bulk_updates["key_tariff_updates"]:
-            for client_id, new_tariff_id in bulk_updates["key_tariff_updates"]:
-                await session.execute(update(Key).where(Key.client_id == client_id).values(tariff_id=new_tariff_id))
-            logger.info(f"Bulk: обновлено {len(bulk_updates['key_tariff_updates'])} тарифов ключей")
+        to_add = bulk_updates.get("notifications_to_add") or []
+        if to_add:
+            await bulk_add_notifications(session, to_add, commit=False)
 
-        for tg_id, notification_type in bulk_updates["notifications_to_add"]:
-            await add_notification(session, tg_id, notification_type)
+        to_delete = bulk_updates.get("notifications_to_delete") or []
+        if to_delete:
+            await bulk_delete_notifications(session, to_delete, commit=False)
 
-        for tg_id, notification_type in bulk_updates["notifications_to_delete"]:
-            await delete_notification(session, tg_id, notification_type)
-
-        if bulk_updates["notifications_to_add"] or bulk_updates["notifications_to_delete"]:
+        if to_add or to_delete:
             logger.info(
-                f"Bulk: обработано {len(bulk_updates['notifications_to_add'])} добавлений "
-                f"и {len(bulk_updates['notifications_to_delete'])} удалений уведомлений"
+                f"Bulk: обработано {len(to_add)} добавлений и {len(to_delete)} удалений уведомлений"
             )
 
         await session.commit()
diff --git a/handlers/notifications/hot_leads_notifications.py b/handlers/notifications/hot_leads_notifications.py
index 26217f64..f94903da 100644
--- a/handlers/notifications/hot_leads_notifications.py
+++ b/handlers/notifications/hot_leads_notifications.py
@@ -1,13 +1,16 @@
 from aiogram import Bot
 from aiogram.types import InlineKeyboardButton
 from aiogram.utils.keyboard import InlineKeyboardBuilder
-from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from config import DISCOUNT_ACTIVE_HOURS, HOT_LEAD_INTERVAL_HOURS
 from core.bootstrap import NOTIFICATIONS_CONFIG
-from database import add_notification, check_notification_time, get_hot_leads
-from database.models import Notification
+from database import (
+    add_notification,
+    check_notification_time_bulk,
+    get_hot_lead_notification_flags,
+    get_hot_leads,
+)
 from database.tariffs import get_tariffs
 from handlers.buttons import MAIN_MENU
 from handlers.notifications.notify_kb import build_hot_lead_kb
@@ -28,38 +31,48 @@ async def notify_hot_leads(bot: Bot, session: AsyncSession):
 
     try:
         leads = await get_hot_leads(session)
+        if not leads:
+            logger.info("Нет горячих лидов для уведомлений.")
+            return
+
+        flags = await get_hot_lead_notification_flags(session, leads)
+        can_send_after_step1 = await check_notification_time_bulk(
+            session, [(tid, "hot_lead_step_1") for tid in leads], hot_lead_interval_hours
+        )
+        step2_expired_can_send = await check_notification_time_bulk(
+            session, [(tid, "hot_lead_step_2") for tid in leads], discount_active_hours
+        )
+        can_send_after_step2 = await check_notification_time_bulk(
+            session, [(tid, "hot_lead_step_2") for tid in leads], hot_lead_interval_hours
+        )
+
+        discount_tariffs = await get_tariffs(session, group_code="discounts")
+        active_discount_tariffs = [t for t in discount_tariffs if t.get("is_active")]
+        discount_max_tariffs = await get_tariffs(session, group_code="discounts_max")
+        active_discount_max_tariffs = [t for t in discount_max_tariffs if t.get("is_active")]
+
         notified = 0
 
         for tg_id in leads:
-            has_step_1 = await session.scalar(
-                select(select(Notification).filter_by(tg_id=tg_id, notification_type="hot_lead_step_1").exists())
-            )
+            step_flags = flags.get(tg_id, set())
+            has_step_1 = "hot_lead_step_1" in step_flags
+            has_step_2 = "hot_lead_step_2" in step_flags
+            has_step_3 = "hot_lead_step_3" in step_flags
+            has_expired_notification = "hot_lead_step_2_expired" in step_flags
+
             if not has_step_1:
                 await add_notification(session, tg_id, "hot_lead_step_1")
                 logger.info(f"[HOT LEAD] Шаг 1 — зафиксировано без отправки: {tg_id}")
                 continue
 
-            has_step_2 = await session.scalar(
-                select(select(Notification).filter_by(tg_id=tg_id, notification_type="hot_lead_step_2").exists())
-            )
             if not has_step_2:
-                can_send = await check_notification_time(
-                    session,
-                    tg_id=tg_id,
-                    notification_type="hot_lead_step_1",
-                    hours=hot_lead_interval_hours,
-                )
-                if not can_send:
+                if (tg_id, "hot_lead_step_1") not in can_send_after_step1:
                     continue
-
-                discount_tariffs = await get_tariffs(session, group_code="discounts")
-                active_discount_tariffs = [t for t in discount_tariffs if t.get("is_active")]
                 if not active_discount_tariffs:
                     logger.warning(
                         f"[HOT LEAD] Пропуск шага 2 для {tg_id}: нет активных тарифов со скидкой (discounts)"
                     )
                     continue
-
                 keyboard = build_hot_lead_kb()
                 result = await send_notification(bot, tg_id, None, HOT_LEAD_MESSAGE, keyboard)
                 if result:
@@ -68,25 +81,10 @@ async def notify_hot_leads(bot: Bot, session: AsyncSession):
                     notified += 1
                 continue
 
-            has_step_3 = await session.scalar(
-                select(select(Notification).filter_by(tg_id=tg_id, notification_type="hot_lead_step_3").exists())
-            )
-            has_expired_notification = await session.scalar(
-                select(
-                    select(Notification).filter_by(tg_id=tg_id, notification_type="hot_lead_step_2_expired").exists()
-                )
-            )
             if not has_step_3 and not has_expired_notification:
-                expired = await check_notification_time(
-                    session,
-                    tg_id=tg_id,
-                    notification_type="hot_lead_step_2",
-                    hours=discount_active_hours,
-                )
-                if expired:
+                if (tg_id, "hot_lead_step_2") in step2_expired_can_send:
                     builder = InlineKeyboardBuilder()
                     builder.row(InlineKeyboardButton(text=MAIN_MENU, callback_data="profile"))
-
                     result = await send_notification(
                         bot,
                         tg_id,
@@ -97,26 +95,16 @@ async def notify_hot_leads(bot: Bot, session: AsyncSession):
                     if result:
                         await add_notification(session, tg_id, "hot_lead_step_2_expired")
                         logger.info(f"📭 Скидка упущена — отправлено уведомление: {tg_id}")
-                    continue
+                continue
 
             if not has_step_3:
-                can_send = await check_notification_time(
-                    session,
-                    tg_id=tg_id,
-                    notification_type="hot_lead_step_2",
-                    hours=hot_lead_interval_hours,
-                )
-                if not can_send:
+                if (tg_id, "hot_lead_step_2") not in can_send_after_step2:
                     continue
-
-                discount_max_tariffs = await get_tariffs(session, group_code="discounts_max")
-                active_discount_max_tariffs = [t for t in discount_max_tariffs if t.get("is_active")]
                 if not active_discount_max_tariffs:
                     logger.warning(
                         f"[HOT LEAD] Пропуск шага 3 для {tg_id}: нет активных тарифов с максимальной скидкой (discounts_max)"
                     )
                     continue
-
                 keyboard = build_hot_lead_kb(final=True)
                 result = await send_notification(bot, tg_id, None, HOT_LEAD_FINAL_MESSAGE, keyboard)
                 if result:
diff --git a/handlers/notifications/notify_utils.py b/handlers/notifications/notify_utils.py
index 59c4f940..dc6e2323 100644
--- a/handlers/notifications/notify_utils.py
+++ b/handlers/notifications/notify_utils.py
@@ -358,7 +358,7 @@ async def prepare_key_expiry_data(key, session: AsyncSession, current_time: int)
     device_limit = 0
 
     try:
-        name, subgroup_title, traffic_limit_gb, device_limit, _ = await get_key_tariff_display(
+        name, subgroup_title, traffic_limit_gb, device_limit, _, _ = await get_key_tariff_display(
             session=session,
             key_record=record,
         )
diff --git a/handlers/payments/fast_payment_flow.py b/handlers/payments/fast_payment_flow.py
index 983e4ea4..9eedacb9 100644
--- a/handlers/payments/fast_payment_flow.py
+++ b/handlers/payments/fast_payment_flow.py
@@ -390,11 +390,11 @@ async def fastflow_apply_coupon(message: Message, state: FSMContext, session: An
 
     required_amount_new = int(max(0, ceil(float(new_price) - float(balance_now))))
 
+    percent_value = int(getattr(coupon, "percent", 0) or 0)
+
     await create_coupon_usage(session, coupon.id, message.from_user.id)
     await update_coupon_usage_count(session, coupon.id)
 
-    percent_value = int(getattr(coupon, "percent", 0) or 0)
-
     temp_payload_updated = dict(temp_payload)
     temp_payload_updated["required_amount"] = int(required_amount_new)
     if "selected_price_rub" in temp_payload_updated:
diff --git a/handlers/refferal.py b/handlers/refferal.py
index cd01eb4f..475ef29c 100644
--- a/handlers/refferal.py
+++ b/handlers/refferal.py
@@ -43,7 +43,7 @@ from handlers.texts import (
 from logger import logger
 
 from .texts import get_referral_link
-from .utils import edit_or_send_message, format_days
+from .utils import edit_or_send_message, format_days, safe_answer_inline_query
 
 
 router = Router()
@@ -139,7 +139,7 @@ async def inline_referral_handler(inline_query: InlineQuery, session: AsyncSessi
 
     trial_tariffs = await get_tariffs(session, group_code="trial")
     if not trial_tariffs:
-        await inline_query.answer(results=[], cache_time=0)
+        await safe_answer_inline_query(inline_query, results=[], cache_time=0)
         return
 
     trial_days = trial_tariffs[0]["duration_days"]
@@ -168,7 +168,7 @@ async def inline_referral_handler(inline_query: InlineQuery, session: AsyncSessi
             )
         )
 
-    await inline_query.answer(results=results, cache_time=60, is_personal=True)
+    await safe_answer_inline_query(inline_query, results=results, cache_time=60, is_personal=True)
 
 
 @router.callback_query(F.data.startswith("show_referral_qr|"))
diff --git a/handlers/start.py b/handlers/start.py
index 6aebb2b5..6a7c31c1 100644
--- a/handlers/start.py
+++ b/handlers/start.py
@@ -66,7 +66,7 @@ from middlewares.session import release_session_early
 
 from .admin.panel.keyboard import AdminPanelCallback
 from .refferal import handle_referral_link
-from .utils import edit_or_send_message, extract_user_data
+from .utils import edit_or_send_message, extract_user_data, safe_answer_callback
 
 
 router = Router()
@@ -127,7 +127,7 @@ async def check_subscription_callback(callback: CallbackQuery, state: FSMContext
         if member.status not in ["member", "administrator", "creator"]:
             await prompt_subscription(callback)
             return
-        await callback.answer(SUBSCRIPTION_CONFIRMED_MSG)
+        await safe_answer_callback(callback, SUBSCRIPTION_CONFIRMED_MSG)
         data = await state.get_data()
         original_text = data.get("original_text") or callback.message.text
         user_data = data.get("user_data") or extract_user_data(callback.from_user)
@@ -135,7 +135,7 @@ async def check_subscription_callback(callback: CallbackQuery, state: FSMContext
         await process_start_logic(callback.message, state, session, admin, original_text, user_data)
     except Exception as e:
         logger.error(f"[CALLBACK] Ошибка подписки: {e}", exc_info=True)
-        await callback.answer(SUBSCRIPTION_CHECK_ERROR_MSG, show_alert=True)
+        await safe_answer_callback(callback, SUBSCRIPTION_CHECK_ERROR_MSG, show_alert=True)
 
 
 async def process_start_logic(
@@ -229,11 +229,7 @@ async def process_start_logic(
 
 async def handle_coupon_link(part, message, state, session, admin, user_data):
     code = part.split("coupons")[1].strip("_")
-    coupon = await get_coupon_by_code(session, code)
-    if coupon:
-        await activate_coupon(message, state, session, code, admin=admin, user_data=user_data)
-        if getattr(coupon, "days", None):
-            return
+    await activate_coupon(message, state, session, code, admin=admin, user_data=user_data)
 
 
 async def handle_gift(part, message, state, session, user_data):
@@ -268,7 +264,7 @@ async def handle_referral_link_safe(part, message, state, session, user_data):
 
 
 async def prompt_subscription(callback: CallbackQuery):
-    await callback.answer(NOT_SUBSCRIBED_YET_MSG, show_alert=True)
+    await safe_answer_callback(callback, NOT_SUBSCRIBED_YET_MSG, show_alert=True)
     kb = InlineKeyboardBuilder()
     kb.row(InlineKeyboardButton(text=SUB_CHANELL, url=CHANNEL_URL))
     kb.row(InlineKeyboardButton(text=SUB_CHANELL_DONE, callback_data="check_subscription"))
diff --git a/handlers/tariffs/tariff_display.py b/handlers/tariffs/tariff_display.py
index 9a1239eb..950e8af5 100644
--- a/handlers/tariffs/tariff_display.py
+++ b/handlers/tariffs/tariff_display.py
@@ -18,9 +18,11 @@ async def get_effective_limits_for_key(
     tariff_id: int | None,
     selected_device_limit: int | None,
     selected_traffic_gb: int | None,
+    tariff: dict | None = None,
 ) -> tuple[int, int]:
-    """Возвращает лимиты устройств и трафика с учётом выбранных значений."""
-    tariff = await get_tariff_by_id(session, int(tariff_id)) if tariff_id else None
+    """Возвращает лимиты устройств и трафика с учётом выбранных значений. tariff опционален — если передан, get_tariff_by_id не вызывается."""
+    if tariff is None and tariff_id:
+        tariff = await get_tariff_by_id(session, int(tariff_id))
 
     if tariff:
         base_devices = tariff.get("device_limit")
@@ -137,18 +139,6 @@ async def resolve_price_to_charge(session: AsyncSession, state_data: dict[str, A
     return int(base_price + device_add_rub + traffic_add_rub)
 
 
-async def resolve_vless_enabled(session: AsyncSession, tariff_id: int | None) -> bool:
-    """Проверяет, включён ли VLESS в тарифе."""
-    if not tariff_id:
-        return False
-
-    tariff = await get_tariff_by_id(session, int(tariff_id))
-    if not tariff:
-        return False
-
-    return bool(tariff.get("vless"))
-
-
 async def get_key_tariff_display(
     session: AsyncSession,
     key_record: dict[str, Any],
@@ -158,8 +148,9 @@ async def get_key_tariff_display(
     """Возвращает отображение тарифа и эффективные лимиты, приоритет — данные панели."""
     tariff_id = key_record.get("tariff_id")
     if not tariff_id:
-        return "", "", 0, 0, False
+        return "", "", 0, 0, False, None
 
+    tariff = await get_tariff_by_id(session, int(tariff_id))
     selected_device_limit = selected_device_limit_override
     selected_traffic_gb = selected_traffic_gb_override
 
@@ -184,6 +175,7 @@ async def get_key_tariff_display(
         tariff_id=int(tariff_id),
         selected_device_limit=selected_device_limit,
         selected_traffic_gb=selected_traffic_gb,
+        tariff=tariff,
     )
 
     server_cluster_id = key_record.get("server_id")
@@ -216,7 +208,6 @@ async def get_key_tariff_display(
 
     traffic_limit_gb = int(traffic_limit_bytes / GB) if traffic_limit_bytes else 0
 
-    tariff = await get_tariff_by_id(session, int(tariff_id))
     if tariff:
         tariff_name = tariff.get("name", "—")
         subgroup_title = tariff.get("subgroup_title") or ""
@@ -226,7 +217,7 @@ async def get_key_tariff_display(
         subgroup_title = ""
         vless_enabled = False
 
-    return tariff_name, subgroup_title, traffic_limit_gb, device_limit, vless_enabled
+    return tariff_name, subgroup_title, traffic_limit_gb, device_limit, vless_enabled, tariff
 
 
 async def get_key_tariff_addons_state(
@@ -260,6 +251,7 @@ async def get_key_tariff_addons_state(
         traffic_limit_gb,
         device_limit,
         vless_enabled,
+        tariff,
     ) = await get_key_tariff_display(
         session=session,
         key_record=key_record,
@@ -282,7 +274,6 @@ async def get_key_tariff_addons_state(
     addons_devices_enabled = False
     addons_traffic_enabled = False
 
-    tariff = await get_tariff_by_id(session, int(tariff_id))
     if tariff and tariff.get("configurable"):
         is_tariff_configurable = True
 
diff --git a/handlers/utils.py b/handlers/utils.py
index 067e02cd..bc73fe9a 100644
--- a/handlers/utils.py
+++ b/handlers/utils.py
@@ -13,6 +13,7 @@ from aiogram.types import (
     BufferedInputFile,
     CallbackQuery,
     InlineKeyboardMarkup,
+    InlineQuery,
     InputMediaAnimation,
     InputMediaPhoto,
     InputMediaVideo,
@@ -58,6 +59,19 @@ async def safe_answer_callback(callback_query: CallbackQuery, text: str | None =
             raise
 
 
+async def safe_answer_inline_query(inline_query: InlineQuery, *args: object, **kwargs: object) -> None:
+    """
+    Вызывает inline_query.answer(), не поднимая исключение при устаревшем запросе
+    (query is too old / response timeout). При нагрузке inline может обрабатываться с задержкой.
+    """
+    try:
+        await inline_query.answer(*args, **kwargs)
+    except TelegramBadRequest as e:
+        msg = str(e).lower()
+        if not any(phrase in msg for phrase in _CALLBACK_ANSWER_IGNORE):
+            raise
+
+
 async def generate_random_email(
     length: int = 8,
     session: AsyncSession | None = None,
@@ -391,7 +405,8 @@ async def edit_or_send_message(
                             edit_or_send_message.cache.popitem(last=False)
             return
 
-    if not force_text and target_message.caption is not None:
+    caption = getattr(target_message, "caption", None)
+    if not force_text and caption is not None:
         try:
             await target_message.edit_caption(caption=text, reply_markup=reply_markup)
             return