The speed of light is equal to 6.706e+8 miles traveled per hour. This means that the person orbiting the Sun at the speed of light in the same orbit of the Earth would have orbited the Sun many thousands of times compared to the person traveling at 18.5 miles per second. Within that hour of time the person traveling the speed of light would have aged significantly based on the calendar year of the Earth orbiting the Sun. Those many thousands of times translate into many thousands of years not because the person traveling at the speed of light has actually traveled for those thousands of years but instead the fast as light traveler merely completed the orbit around the Sun at a faster rate of velocity.
The person traveling the speed of light around the Sun might have aged immensely based on calendar years but they would still be the same physiological age that they were when they left Earth.