SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b2edf64d76cb5d1c9a039e9d44a89ad43fc9d03377116d179588b554f397d2a' 
  AND token = '25ksJUNR9xBrIay6iTHD6LQ+hkoxMz/aLKE2nC4qKTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

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