SELECT * FROM payments
        WHERE
          (buy_currency_name='USD' OR buy_currency_name = 'EUR')
          AND
          (sell_currency_name='USD' or sell_currency_name='EUR')
          AND operation_rate IN (
                SELECT operation_rate FROM payments
                        WHERE
                            (buy_currency_name='USD' OR buy_currency_name = 'EUR')
                            AND
                            (sell_currency_name='USD' or sell_currency_name='EUR')
          GROUP BY operation_rate HAVING COUNT(operation_rate)>1)
        ;