Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fa17ce702189f92979d9fc097c53a578b206399f5cb40aed05cb28b83b4b6d9' 
  AND token = 'sUjKWCOhmYGeRNuR1mkXkiOyU7M/q81LE1ZB2VSMSaU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}