Back on July 11th, I created a Fixed lock with Chase as a test to see how mean he would be. It was only a test and there wasn't any need to get out. I don't remember the exact duration, but I think it was to last between 1 and 2 weeks.
The lock is now on day 78 and has 97 days left until it unlocks. I believe he has reset the lock two times and add an average of 1-3 days to the lock per 24 hour period. I don't see how the lock will ever end unless Chase randomly decides to unlock it.
My recommendation is to avoid using any of the Bots for a lock unless you are willing to pay to unlock it. Maybe with the cards, there would be a chance of drawing the green cards to get out, but with a fixed lock, it isn't going to happen.
I have been tempted to delete the lock, but have kept it running out of curiosity to see how it plays out.