Wouldn't matter. Tons of bots are scraping every inch of the internet all the time, and if something been online for five seconds, it has been cached/stored somewhere. Always assume that anything you've put up on the internet, can forever be accessed by someone.

The only thing you can do is rotating the token/secret.

Yeah mods can clear the review history - for this very reason!

But as mentioned below - Still advised to change your keys for obvious reasons

Change the keys.