Humans are actually designed for a lifespan of 40-45 years. This is what you might have looked like toward the end of that time. Your lifespan has been artificially extended, due to things like cleanliness and medicine. And not getting bonked on the head, which is also important. In any case, this is the most detailed reconstruction ever done to date. Today, people claim that you'll look like this if you smoke, drink, or drive a car.
None of which was possible 5300 years ago.