SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ddf0201a9f465ea488c9c7b9392d161ffa33a9442ad87b777a33de072db24a92' 
  AND token = '6GBL9+yjcgrsKyPN4VNG4q73Le6SURpy/HFxFDoqwV8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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