A typical game that goes to scoring takes about 120 moves per player (maybe a bit more, but 120 is a nice number for time calculations).
A year ago I made a little spreadsheat to compare the different time control systems used on OGS: 1s per move ranked games - #69 by gennan
Edit: Using that spreadsheet
90 minutes basic time + 1x60s byoyomi = ~50s per move
60 minutes basic time + 1x20s byoyomi = ~33s per move