SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35d20c85422d72dba82f49ec4a62e49406e35b69e6864fa35de458e88c4ac587' 
  AND token = 'NfsnCk81YHBaJy6z7yHSMDO+J1tw/t71Ugj5FW1vmqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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