SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa660dcf243b5f783e2b589e5d3254e9dce14396ee5cae7de8b494a965a7e139' 
  AND token = 'ftw1Ds2e273nFwrpmVMemCkBGkJ7tu1GiPpkma/76hI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

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