Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a213d71e8d3235687d91354bfa52fdb3267ccd7954a7d8fd3b6bc1a22b7e9a2' 
  AND token = 'utwlcVITpZZH7WG3LJSfkImgCNfDrSnG14Zyiq3007M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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