SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbb7b6e153c5e9a54184d551da16964b025a5c90351338aee4abab7636df172d' 
  AND token = 'ZdRQHD4bHhfgJVpW+jTvDJsRp96ECvgV8L/nwUFvbEA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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