Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a8e1d852db5cf3bc01f2902c78813588034b8360001434aa257f05620e95d6a' 
  AND token = '6bvjVDxvG5zs1MjNPOXDbIvQ0yn7aP360c+JFbXqrJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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