Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '545cd6f9a6c69a39c4a9b54faa71d326b23b32166838add799cd61af86155177' 
  AND token = 'W5NsJCAdmwsCxWn4guoaulbfTZfivAAalGmlhPDfSZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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