SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95b7c3a2de3fee9cc6f41a8c6c314566ffa04b6e864dbe485ea523a480cb540f' 
  AND token = 'EG2qZcmlUIDAAdBnGfLsWOhrF/v7Pv1vJQzTmSIpH8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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