Mass delete/unsubscribe timesout

Hi,

I have a large list of 13,000 emails I need to remove. The csv is only 351kb, but the import keeps timing out.

Is there a way to solve this, like the cron jobs for sending emails perhaps but for removing from the database?

Or is there an alternative method? Some form of SQL script I can write, or PHPMyAdmin function?

Thank you.