SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f2e5a198cf1f3fff7551ff5f96db7d081d56afa3072f8e0435d2b43368cd7667' 
  AND token = 'OSwUXkeaYpGO1x56reB0sM/riCWnvt5lq+JWQNBER/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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