<?php
$k = "
SELECT count(*)
FROM {watchdog}
WHERE `type` LIKE 'cron'
AND from_unixtime(timestamp) >= '".date('Y-m-d')." 10:00:00'
AND message = 'Cron run completed.'
";
print $k;
SELECT count(*)
FROM {watchdog}
WHERE `type` LIKE 'cron'
AND from_unixtime(timestamp) >= '2017-07-10 10:00:00'
AND message = 'Cron run completed.'
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
SELECT count(*)
FROM {watchdog}
WHERE `type` LIKE 'cron'
AND from_unixtime(timestamp) >= '2017-07-10 10:00:00'
AND message = 'Cron run completed.'