SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5aeb8fa764dc5854abc399fcbbf9a10176dfdd33f4378a672a8308c103d1ca5' 
  AND token = '5kil76/YpIr5QUU/zCDFVJfhuILUbK0SViSNXvj68Hw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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