Comment 14 for bug 1600164

> * fixing mysql.service to use After=time-sync.target and Wants=time-sync.target

As far as I understand this is unsuitable to be done by default since not all systems will necessarily ever reach "time synced", for example if they're intentionally being used offline.

But this does seem like a reasonable workaround for sysadmins to use locally when using MySQL in broken environments. In this case, you can override packaged service behaviour locally in /etc (see systemd-system.conf(5)).