Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ae794d0388d9d511b5aea3e5a8712b72fc35543bdc5d708a01a8722567c4d9c' 
  AND token = 'lTkNxFeFC4fng9NA7005ZdCJix0uVFM6CIzc7sqHkIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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