Top level competitive flying 200's are sub 10s. That's an average speed over the timed distance of 72km/h or 44.75 mph with a peak around 75-77km/h.

https://en.wikipedia.org/wiki/World_record_progression_track...

edit to add the Tokyo Olympics qualifiers all under 10 seconds: https://en.wikipedia.org/wiki/Cycling_at_the_2020_Summer_Oly...