Yes, I could chip away at the lock, insert the key and turn it to unlock the door. However, I couldn't actually pull the door open. It was frozen shut!! I needed something to pry it loose. A crow bar would probably work, but it might do more damage than I wanted. She's an old car - 1998 Honda Civic and she creaks!!
I rummaged around the odds and ends drawer and finally found a fairly sturdy looking can opener - "Tin Lizzy" came to mind :) I inserted it in the car door and Bingo, it opened. So the next time you need to "break the ice," you may want to be a little inventive. Can openers can have more than one use!!
Have a great day!!