SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6072ff07f2d714691b88d19196b2fe4699f9cb9c3cb878a16f12a80b3af12667' 
  AND token = 'v/NROPTi6iYuW/JwkFPXp/iHMGrrNNzJkKA9yQZOw74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables