I don't know anything about magnetic locking, but I did some superconducter modeling work as an undergrad. The crazy thing about quantum systems, is that every particle acts in unison. And, there is no informational transfer necessary from one side of the system to the other to do so. Identity can span over space and time. In this case, a noticeable amount of it. But, every MRI machine works on this crazy principal. We do use this stuff.
"We start with a single crystal sapphire wafer and coat it with a thin (~1µm thick) ceramic material called yttrium barium copper oxide (YBa2Cu3O7-x ). The ceramic layer has no interesting magnetic or electrical properties at room temperature. However, when cooled below -185ºC (-301ºF) the material becomes a superconductor. It conducts electricity without resistance, with no energy loss. Zero."