Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41e22c2db356d9a12fb8d71ceaf20e7ed0d38eefbe055f85bc65bcaa7c0bdd95' 
  AND token = 'fdwwiPlNvZ6lGOmfgY3PKxg/e2/9tRWiwUCwEli7TUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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