The six-year-old horse was winning for the first time in his career after five defeats.
Giorgio Quercus, running for the first time in 612 days, made it two for McCoy and Henderson as he prevailed by a length and a quarter on a special all-weather card on the flat run for National Hunt horses hit by the big freeze.
"He hadn't run for a long time, but he's quite straightforward and I just wanted to make sure he finished his race," said McCoy.
The 36-year-old rider secured nearly 42 per cent of the vote as he won the BBC award on Sunday night.
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