SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bc35e619634a5aace63569c7a2c21538e0bbfa31f7ec3938672bd44cd383c86' 
  AND token = '8hZjKwSLKY5RkKjAuEhHT+4Do0PH84R/vyVxCd0MRrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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