The meeting, which took place at the Russian Railways Arena, ended with a score of 3: 0 in favor of the home team.
Solomon Rondon scored for CSKA in the seventh minute, but the main referee of the meeting, Sergei Karasev, canceled the goal after watching the video replay.
Lokomotiv scored the first goal in the 16th minute.
The goal was scored by François Camano, who scored a pass from Dmitry Rybchinsky.
On the 53rd minute of the meeting, after Fyodor Smolov's kick, the ball into his own net was cut off by CSKA midfielder Ivan Oblyakov.
Grzegorz Krychowiak scored the third goal of Lokomotiv with Anton Miranchuk's pass already in time compensated for the second half, bringing the score to a devastating one.
Thus, Lokomotiv reached the final of the Russian Cup, in which it will play against Krylia Sovetov Samara on 12 May.
Earlier it was reported that Wings of the Soviets reached the Russian Cup final for the first time since 2004.