Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '34c9d0391e18c33714f2b34524c50a424f62bc64361aaf9608f9ebad3acb9707' 
  AND token = 'taEFf4SXxnKwqlZW1Tt4/aEyfOkAkgdqpt3rtUYcEL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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