Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260b11d48d1d7b76a5a1362457dc5fb657da0c698fd0901b5ca158fb573a57c3' 
  AND token = '3ny43BEcNaQQwapF3BtmuEic9w/UEe2wsCyc5H/S9IU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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