Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0499347f20342fe3d08cfb71e4cb1339af8a529da7f0d6a3f6b1a5a8b9df2c1f' 
  AND token = 'WqWXelrzrA5HeOozVZViNrknLMNlY4o42LSUyFvYWnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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