It's not quite that simple. It's not a standard 2341 key and it has multiple contacts. It's a spring-loaded switch that turns both to the rear and front from the the center locked position.
My machine didn't have a key with it either, but I found one that worked going through some old keys that went to desks etc, CH751 worked with mine. I'm not sure if they're all the same or not. If they are, the good news is CH751 is a standard travel trailer storage lock key. So ItsaSlotMachine try one of those. You can get them on Ebay, Amazon, etc pretty cheap.