Pause loop execution of one function from another?

Question

Python

There are two asynchronous functions, the lunch loops while True.
1 function reads a variable from the base in a loop every 5 minutes and then works with it.
2 function changes this variable and writes to the database every 2 minutes
There is a possibility that 1 function will receive the variable and the second will change it before the loop in the first one
ends

async def fun_1():
    while True:
        sql = "SELECT variable FROM table_variable WHERE ids = '1'"
        variable_X = cursor.execute(sql).fetchall()[0][0]
        variable_Y = variable_X + variable_Z
        await asyncio.sleep(5)
        variable_W = variable_X + variable_Z
        await asyncio.sleep(5)
        variable_F = variable_X + variable_Z
    await asyncio.sleep(300)
    
async def fun_2():
    while True:        
        variable_X = # Some code 
        # ЗАПИСЬ В ТАБЛИЦУ table_variable
    await asyncio.sleep(180)

Answer 1

Everything is bad here.
1. stop using global variables
2. what's the point of using async when working with the database is blocking?
And so, of course, there is a mutex in the form of asyncio.Lock, but damn, this code is an example of how to do everything wrong.