Some older women look really good for their age, and if they have been more focused on career most of their adult life, they may not have yet experienced marriage or had kids.
That being said, you should be extra cautious of dating profiles like this.
The best way to tell they are fake on Match is if you notice that the woman has barely any requirements in a partner that she is looking for. When she is practically open to almost everyone regardless of race, culture, career, political persuasion, etc., that is when you know the profile is truly fake.
No one, not even the most desperate woman is open to just about everyone. The scammer just makes it look like they are open to just about anyone in order to attract as many victims as possible or they are using a bot that is unable to be more specific with picking requirements.