Drupal - Release cron lock

It's now in the semaphore table with the key name "cron". This can be removed via a drush sqlq "DELETE FROM semaphore WHERE name = 'cron';" command.

Or, if you can execute PHP in Drupal bootstrapped environment, you can run the line:

\Drupal::lock()->release('cron');

Thanks to Shawns answer..

drush php-eval "\Drupal::lock()->release('cron');"

Seemed to help!