SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ad0a60778de883350ed13c6165ceadeed990770f4ae5e07ad96e31b8c01818e' 
  AND token = 'Q8lCVf/zyV4q4bGf2avO9dXoPGm4khldgXryIwhzNoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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