Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '353a3d1fdf651c22d9d8cfe4ec0157c8d5617fd0dc176280148e362ccfc5a86a' 
  AND token = 'PPbLFdQb8gcIEO+U4P2eUjY2vnoyN6C9X0H5jzlKA3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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