Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '434e14eee9dfc9077194f30454b3c6ba435b6d4aaabd5c8827c9c15123fc01d3' 
  AND token = 'ws5vJFVupoTwQ9gHVUs1jYZdlN8Gxwc4gmGPeEYeUxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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