Posting here in case this is helpful for anyone down the road!
You can sync Airtable data to MySQL (and send data in the reverse direction) easily with Bracket. You just have to input your Airtable API key and connect it to your MySQL database. It handles syncs in just either direction, or both at the same time.
There's also features that you can customize. If you only want to sync certain fields in two directions and make other fields read-only in Airtable, or if you want to write queries to make the data you pull into Airtable very customizable, then that's all possible!
That way you can have your data in a scalable backend database but can continue using Airtable as a frontend and keep taking advantage of all of it's valuable features