Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '516f7fff9c29624d63ab3f18ead924570867aacb4b8e28e5391e8b0c995d0309' 
  AND token = 'GSI8J1l0RPXgwt0opIEVhxCZkh3l5aFmdBiTFGIiPSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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