I have a pilots lic that I got over 35 years ago. I believe it is still valid, and is for the rest of my life. However, I dont have a current medical ticket and havent for years. But technically, I have to do is go down and take the medical and I can fly again.
Same should apply for CDL with a med cert only being required to qualify you to drive for a living, like it used to be a few years ago.