SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'dfbcccf337601974b16a041929218ad107e0ca5df36b9a722837b373ee95ce72' 
  AND token = 'mj88Bo5V0Djcdv/HdfWtkL1TQfyNOGorDKg+C76Zh98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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