I was playing with a free online 3D image creation utility called “123D Make” a couple of weeks ago. You took still photos around an object and the application generated a 3D image that could be rotated in various directions.
I just came across this article where (several years ago now) some researchers proved that they could take an image of keys from a relatively long distance (say from one high rise office window across to another high rise office where a set of keys were laying on a desk. They were then able with software they had created to make a working copy of the key they had photographed from say 200 feet away. I am not familiar with the materials that are used in 3D printing, but it would seem conceivable that plastic could be sturdy enough to make at least a temporarily working key copy.