Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd64101213ec5772f14e3dafd690b30a6bc91854e76689cbff824d628825186dd' 
  AND token = 'fMfynwf5KhotqDDIWMTDytJw1+na6Y7lIQq9BqJsSFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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