Have you ever wanted a gui that gave you the option to award everyone with a certain key, or even all the keys? If yes this is the script for you, I recommend downloading TuSKe and skQuery to insure there are no errors running this script using skript. You would need to change some of the code so it would work for your keys.

Main Dependency: CratesPlus

command: /keyall
and there is a aliases for the command: /ka