Snapshot backup fail for plugin folder

On one of my sites Snapshot process is failing when trying to back up the plugin folder. I get "Internal Server Error".
I see the followign error in the server error log:
[Mon Jul 30 13:16:35.112979 2018] [fcgid:warn] .... mod_fcgid: read data timeout in 305 seconds, referer:

Is there a way to solve this without increasing FcgidIOTimeout limit?