SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2be52ccb71870c207249cc9d41843dbe19e1b72e7b98e93189ff96dfd7287560' 
  AND token = 'UoDxfjOxoM5gri6OXCbRTnbOwI9lpOwD17g6+ldyMMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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