Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '370be2aa78f0595781b0ee1abe45028a748048ad91938b31ee5bc63a00a07da9' 
  AND token = 'XgUzaLcZh7zDwY6Mv/6v/YXc/K+NLysJZ27xqklc4zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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