Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b25ff7ac1d23ed7192ec7c57ca9a72127f919bd56ee3a4def1fd7f4940412cb4' 
  AND token = 'K128OoZhcp4mFnU2poalbjy7QakG5XvACjlwbH4pB3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00191

JSON explain

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