Does this plugin use wp-cron.php? I had just set it up

Does this plugin use wp-cron.php? I had just set it up to do a weekly scan (on Sunday at midnight) and was getting it to edit the wp-config.php site to change the salts, and my dedicated server crashed. The hosting company owner told me the issue was caused on this site by a huge amount of calls like this:
wp-cron.php?doing_wp_cron=1458076473.7728810310363769531250 HTTP/1.0" 500 251 "-" "WordPress/4.4.2;
and told me to add a line in wp-config to disallow wp-config,php from running. However it must still be bombarding because the server crashed again and I can't get access tot he wp-config to edit it. I don't know if this is just a coincidence that it crashed when I was in Defender, or if it has caused the problem.