Toney tapped in Christian Norgaard's flick-on after a Bryan Mbeumo corner in the 32nd minute.
And in second-half injury-time his header sent through Yoane Wissa who calmly doubled the visitors' lead.
Victory saw the Bees move up to eighth in the Premier League table, six points off the top four, and 25 points behind leaders Arsenal.
"It's a tough league but hopefully we can catch Arsenal," said Toney after full-time.
And in second-half injury-time his header sent through Yoane Wissa who calmly doubled the visitors' lead.
Victory saw the Bees move up to eighth in the Premier League table, six points off the top four, and 25 points behind leaders Arsenal.
"It's a tough league but hopefully we can catch Arsenal," said Toney after full-time.