SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93f34767d68ca062f7d589a56129f4ae73e41ab4973be3d39c78662da76eb841' 
  AND token = 'lyFZmqKbNXMTZhusmyY4tFHJNcw/PDcj66S1z8miv50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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