I personally do use aiohttp, sanic, asyncio, aiomysql, ... and I really enjoy it. It's a huge difference in performance. Was doing some benchmarks for my Slack Applications / bots and the difference was noticeable, even by the end users. (Mostly prototypes / MVPs, reason for experimenting with sanic).
Anyway, here's an example. You can learn how to fire & wait for one request and how to fire & wait for many of them.