How to make timer in python with validation(pytelegrambotapi)?

Question

Python

I have a method that handles buttons:

@bot.message_handler(content_types=['text'])
def buttons(message):
    if message.chat.type == 'private':
        if message.text == 'Задание 1':
           <..Запуск таймера, 30 секунд..>
           <..Результат..>
        elif message.text == 'Задание 2':
           <..Запуск таймера, 60 секунд..>               
           <..Результат..>

How to create two different timers and most importantly, how to make a check: if one is running, then the second cannot be started until the first one ends. All I could find on the Internet is a proposal to create a class with a timer and a boolean variable. If it is correct, please tell me how to do it.