Ring me when our cup noodles are ready
Octave, 22 21 bytes
Saved one byte by changing from while ... end to do ... until.
tic;do
until toc&gt;50;1

tic starts a timer, while toc returns the number of decimal seconds since the last call to tic. We initiate a do - until loop, where we'll loop until toc&gt;50, doing nothing inside the loop. The loop stops after 50 seconds, followed by ans = 1 on the screen.
Try it on TIO (time changed to 5 seconds) or paste it into Octave Online.