example.py

from aiogram import Bot, Dispatcher, executor
import logging

from aiogram.contrib.fsm_storage.memory import MemoryStorage

logging.basicConfig(level=logging.INFO)
token = 'BOT_TOKEN_HERE'
bot = Bot(token)
dp = Dispatcher(bot, storage=MemoryStorage())


@dp.message_handler(lambda m: True)
async def ha(msg):
    is_throttled = await dp.throttle(key='ha', no_error=True, user=123)
    if is_throttled:
        pass
    else:
        pass

if __name__ == '__main__':
    executor.start_polling(dp)