Bismihi ta'ala

Should you be solely interested in getting a fiqhi answer to whether it is permissible for a husband to do mut'ah without his wife's knowledge or consent, you must refer to your Marja' taqleed for that. 

However, what I would say to you that this kind of conduct is unethical for you do as a husband. If you need a massage, then a male masseur will be stronger and work better with deeper muscle tissue, so that would better for you. 

You must be a mu'min who cares about being compliant to shari'ah, and a mu'min always makes sure he is not just observing taqwa, but also maintaining his household and commitment to his wife. Doing something like this will let your lust venture somewhere else, and that wont be healthy for your marital relationship. 

This is my advice to you, and I am sure you can find alternatives to this so.

And Allah knows best.