Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6ec91309577335953e264a578a144fb0d4f1392bf02938c2d7976b6c7b8e095' 
  AND token = 'HjF4A4j3FSmdA0vDsJMhl46JiFxAJHcU8hyxmU9Poj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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