Is This the Earliest Depiction of Jesu's Crucifixion?

The image shows a man with a hand raised, maybe it's a gesture of worship. And the figure on the cross appears human, apart from the fact it's got a donkey's head. There is an inscription in greek that reads as, alexaminos worships a could be a god,. This is usually taken to be mocking an individual called alexamino for his worship of christ. A christian says, this the earliest depiction of jesu's crucifixion.