Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a9d0f098efede9fa22cb7f7396ba723b8b26675476ef47cb0ba97226b01cd72' 
  AND token = 'M64Os4xt+djJCa96OA76CkjuCjKOFpX2kA8ieaycYkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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