Look at the screw heads and see if there are previous "marks" from loosening it. You know what side they'd be on...
If they are there then the pump has been wet before.
Looks as if it sucked some gravel and got into the impeller housing jambing it then the torque flexed the shaft till it snapped the ceramic shaft...
Look in the motor housing and see what is imbedded in the case that houses the "field" part of the motor...
gravel sand, or whatever...
I think the pump might have been returned...It wouldn't do that with clean water...