At 16:19 of the second period in the Kings/Blues game, Los Angeles requested a Coach's Challenge to review whether a St. Louis player interfered with Los Angeles goaltender Jonathan Quick prior to Carl Gunnarsson's goal.

After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee confirmed no goaltender interference infractions occurred before the puck crossed the goal line.
Therefore the original call stands - good goal St. Louis Blues.
Since the Coach's Challenge did not result in the original call being overturned, the Los Angeles Kings forfeit their time-out.