Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3de88cd6e82552e881b765208e22b0baf6488b4dfaf9a7ef2d3f1c8780790682' 
  AND token = 'W45i3NCBaQBotCq5BCddeVlRKGWkAz3UYFDgllwemSo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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