md5('1618057381') : Generates an MD5 hash for the string '1618057381'.
cast(... as int) : Attempts to convert that hash (a hexadecimal string) into an integer. MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0
to ensure you are using prepared statements to prevent SQL injection. md5('1618057381') : Generates an MD5 hash for the