Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56704cf761a92300e0a01293f5c16d4dc9b9ed7db1c83b863c63d1b0cf48bebe' 
  AND token = 'Z3Y2ckI/xb2DYsgmYbCVx0J4GTJyjNMxYt70d4kq/4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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