Sure the shorter time means less of a chance. But even beyond this, generally speaking it's highly highly highly unlikely you would have gotten HIV from this single exposure. I had sex with many many sex workers unprotected and never got HIV. Given the short duration, even lower chance. I would lay every penny I have without hesitation that you are fine. Seriously.
This is a pretty risky situation. If the masseuse had unprotected intercourse with you, it is likely she has had unprotected intercourse with other men.
It doesn't matter how "clean" someone looks. You cannot determine someone else's HIV or STD status just by their hygiene. People who have HIV or STDs aren't dirty or unhygienic.
Get tested at the appropriate time to know your status for sure. You can use a 4th-generation (Ag/Ab) test at least 28 days after the event, or any other test at least 3 months after the event.