https://aiven.io/free-mysql-database
Start prototyping, experiment, and spin up your first MySQL database in the cloud at no cost. And if your needs grow, easily ...

https://www.digitalocean.com/products/managed-databases-mysql
Launch a MySQL cluster in a few clicks and access it via our UI or API. We'll handle maintenance and updates. Easily migrate databases from external servers, ...

https://cloud.google.com/mysql/mysql-hosting
MySQL hosting in Google Cloud can be done via self-managed route or through the fully managed option of Cloud SQL for MySQL.