The domestic athlete finished in 1 minute 06.988 seconds, having updated his personal record.
The victory was won by the Chinese Zhongzhang Nin (1: 06.656).
Second place went to American Jordan Stoll (1: 06.968)
For Mushtakov, this is already the second medal for the competition day.
He also finished first in the 500 meters.
Earlier it was reported that Elizaveta Golubeva won bronze in the mass start at the KM stage in speed skating.