Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1db750a68915eaec999abf48662bde980443f614cb471c72bf32f0a67d1e08ee' 
  AND token = '4bCs85p+GeJzZzqTXhr/fyXd2/h52Djy8bxZKH6AeD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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