I tried calling Ben for a ride to the store for some lock deicer, but he didn’t answer. Big Steve R gave me his window deicer, but it didn’t work. Eventually I used a small screwdriver to provide more torque to open the passenger side door (along with a full-size screwdriver to break the damn seal around the door itself). Once I got in there, the unlock button failed to loosen the driver-side door. The darn thing was FROZEN SOLID!
Much manual work and grunting got the door open and I drove it home.
I decided that until the air temperature comes up, I will park in my Garage, with my doors unlocked.
Hopefully that will be the end of getting locked out.