Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f7960f3b9bf907b89b7ce696693b0c78d0f4fc511a0188bd4423bd1017ff803' 
  AND token = 'sBGscZLb/9kToAkU363mXuqaQu3VZ1BOok2J/NGQKVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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