Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55872946f566afc33b7c404a9bf57cd864d16a35f3f8a4f275b57a1fd7fe4c7f' 
  AND token = 'J8Ki66N48tlLkY1tH7pXVQDPE0P4Vw6WF8dX/BQ0nq8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}