Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8b1d6d0ab2056c50c143d22b857d6ef978b240c579eb14cf5f457f54f0aa3e94' 
  AND token = '7/98SscPSs+Ko59buPzMdcemC4UXMZ53JiaoA9RgXAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}