Age itself is not a barrier to having cosmetic surgery. The most important factor is your health status. There is no shortage of people your age and older who are healthy and vibrant and would do well with such a procedure. Talk to your plastic surgeon to see if you are a good candidate for this procedure. I personally have performed breast augmentations on many women older than you who all did quite well and wished they had done it sooner. The oldest woman was 72 and wished to have this done after seeing what this surgery did for her daughter and granddaughter. She was extremely active, very healthy and a lower surgical risk than many people half her age.
For the best results seek the consultation of a plastic surgeon certified by the American Board of Plastic Surgery. They have a website listing all the certified plastic surgeons. Members of the American Society of Aesthetic Plastic Surgery will all be board certified in plastic surgery and have demonstrated an interest and competence in cosmetic plastic surgery as well.