I would like to get a Maypure hair loss treatment during my lunch break. How long will the procedure take?

Lately, perhaps due to stress, my receding hairline seems to be getting wider, so I'm planning to visit Maypure this week. As a working professional, I'm looking into hair loss treatments by squeezing them into my weekday lunch break, but I'm not sure if I'll have enough time. I heard in online communities that the principle involves rapidly freezing the scalp to -20 degrees Celsius to completely constrict the pores, so it supposedly finishes very quickly. Is that true? If it works by drastically lowering the scalp temperature to freeze the hair so it can't escape, I don't think it would take much time. I'm wondering if I can finish the entire treatment, eat, and return safely within a little over an hour during my lunch break. I would really appreciate it if those who have personally experienced hair loss treatments could share the approximate time required!