Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fe0f87f8e46d85d914eff08496d6a11c5b54afb06cca55e7f4f4afdd891c1de' 
  AND token = 'FIXcbgQu8mc+1tizAYNXiTYRpXWosfrOIIrai4wPB2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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