Locks that small are difficult for me to pick.
Bolt cutters would cut it in 30 seconds.
Dremel with a cutting disc would take 45 seconds.
Smashing the lock against a concrete block using a 22 ounce framing hammer would take approximately 120 seconds if it is top quality.
Etching it with acid and an electrode would take... longer.
The shackles ar not hardened on 90%+ of the locks that size. I would be surprised if the box wrench trick did not work. It might take a moment longer and a bit more force than in that video.
I once took off my running shoe and beat a lock, that looked considerably more substantial than that but considerably less substantial than the one on my HS locker, until it fell off. Took me about three minutes and a little sweat. The heel of the shoe never looked the same again.
Assuming that was used in shipping and is a TSA lock, it is a breeze to make a key. I hear.
If you don't own and feel comfortable operating ANY of those tools, I recommend you call a locksmith.
