Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5906985d752d311cc9b3179c9d864f88ae4380b824e64c2101a1903c7bb8c16e' 
  AND token = '6hi3sdUM1AD+axxVd76PWKLxcvq8tAG3Gp0jxOVfb4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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