Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e55654dd65b4cb3e7db54171b8a5dcb71453b39284421ff331f262e0ef7e6aa' 
  AND token = '1y6kaOQ4mH9fsI0gFqU8UUAo++ZqQZdpW0i7xaaW/gQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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