Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83719ebf0d6f8b5d24d231a9212d9705e0da653c52e1e4a0dfb27a771bae65c7' 
  AND token = '0j8DVtIlzizDNmJxAzFSovcdXFhX5lX8pRn7f4ieyYI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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