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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e51b2a43e2b457451e110a14ba24780a1446b328a03df1ef5705c48b9866f66f' 
  AND token = 'xPeZw6l4egd/7Re3lXAK9z4QNo0lP6mGjf4rfT0ferI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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