At 13:13 of the second period in the Blues/Kings game, St. Louis requested a Coach's Challenge to review whether a Los Angeles player interfered with St. Louis goaltender Jake Allen prior to Drew Doughty'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 Los Angeles Kings.
Since the Coach's Challenge did not result in the original call being overturned, the St. Louis Blues forfeit their time-out.