Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8822fd49ec87f9ade14fc796c1ca9a18b46363c48eb1debc173cfa66dfd4502f' 
  AND token = 'PQynBowZqgSE30cbD1EMnH83akaLRWXC+WU9wlGqK2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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