Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f41deec65a2fe465d70b81d11ae0a28e00cfb8b38ee99890b98cd2fb328bcbb' 
  AND token = 'GceS8oNtbzkO/oq3QBQaaOuX1yr2Qg9YmTqF3jqsbEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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