Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33197f300dab3a0bf7aa5c70f6bd17e08aceb043b306ed9d48ff5afd1efbf277' 
  AND token = 'FNGaN1y5FYOdhv5auUrZBYownx8sgk8MEkI6GafhUC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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