SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd7226444bd036c96aa0483aaa34c46852e83b6733f2926347d303a745713202' 
  AND token = 'gGvi/W4KBbzBaVcuxCdp/9W193n+A4YW9GjZl0HfK4Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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