No, based on the ages you provided, your parents are not considered old. They are relatively young, especially in today's world where people are having children later in life. Your mom is 50, and your dad is 45, which means they had you at ages 34 and 29, respectively.
Parenthood at these ages is quite common and falls well within the typical childbearing age range for many individuals. People are having children later in life for various reasons, such as pursuing education, establishing careers, or waiting for the right time in their personal lives.
Age is just one factor in determining someone's ability to be a good parent. What's most important is the love, care, and support your parents provide for you. Cherish the time you have with them and focus on building strong and meaningful relationships with your family.