Most hitch locks are easy to bypass. Most hitch locks are only good to keep the honest crook at bay. A lot of them can be bypassed with a crow bar, bolt cutter or cordless drill/grinder. Do some research on google/youtube to figure out how your new lock can be bypassed.
You need to know what type and size flange you have. Not all hitch locks are interchangeable with all trailers.
The one I have, I found online can be bypassed with a large crowbar, to pry it off. I picked this unit has the lock itself is under the tongue and out of visual sight. So if someone wants to pick it or drill it, they have to be laying on their back to find the right spot making it harder to do.
The Lock Picking Lawyer on YouTube has reviewed a lot of them. He has a good review on the Proven Industries hitch lock. He has a recommendation on a different lock than the Optional lock that can be purchased with it.