You can be held in contempt of court for showing up intoxicated. However 0.0057 is less than one-fourth of a beer, one fourth of a glass of wine. It could be explained by drinking a day earlier or even mouthwash. You need to be somewhere between a 0.04 and the legal limit of 0.08 before you can be considered intoxicated. Also no one ordered you to have no alcohol the day before. It is irrelevant to your speeding ticked and irrelevant to your court appearance since you were not under the influence with these trace amounts.