I am not aware of any way a metal key can randomly morph into another physical shape with no help and assuming we don't jam it in there as hard as possible.
Think about quantum mechanics. The same that cause atoms to randomly dislocate in CPU transistors. It is possible for Honda key to morph into Maserati key by the same principle. But it will take longer time than the age of universe to happen. And what if it morphs into dildo not Maserati key?