In order to find the MySQL version that you are using, take the following steps.
1. Log into myTophost Panel and select Plesk Login in order to connect to the Plesk of the plan that you are interested in.
2. Click on Databases (on the right-hand side of the main window).
3. Click on phpMyAdmin for the base you wish to see the version of (make sure that the browser that you are using does not block pop-up windows).
4. Select SQL and enter the following command: SHOW VARIABLES LIKE "%version%"; and click on GO.
5. You can see the MySQL version as shown below.