SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd57e562379cd57ae22c69f781f57b818099703e54314f7af889b482f897c6f08' 
  AND token = 'GCYQimK7z6aFVRw7AczIrY5V6sOkzcRUp/xZEM3+VgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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