Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91276634cc69709c8ea51f905efc824aac089e7af0641ea0411ec10398229a19' 
  AND token = 'vZco/NtNeZFL3nY7gPEI2eo8mDQ9ZLLi+DpgWDhssb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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