Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b477ef7b7ad6238a6c7adbe472612b18118bfdc42da15b0ecf8cd4c781ce96f' 
  AND token = 'u+Y0ejt74f95ocnPWsNyCcQ9y2EhWTJ1nsHvOG3MxNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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