If you can test one key a second (which is unlikely), that's over 12 hours to try all the keys, not to mention having to lug over 800 pounds of keys to the lock

If you can test one key a second (which is unlikely), that's over 12 hours to try all the keys, not to mention having to lug over 800 pounds of keys to the lock in the first place. It's possible, but certainly impractical.