Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed8e4baba1b5157c70ccf2be7c8fab26b9c03b03e40c40e4d39598ac9633a892' 
  AND token = '9x1sfdBYRpDYLtI9iaEOrd8712ZrRMJIhFboOd1fseY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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