Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '829daaf2bb829ccddbff78adee9a68a5e422612c801f12b7ad461ce73dc87162' 
  AND token = 'WESunbQT4vweivJJN2ZgBfbpMjs2zlKwtUAlIsK+wak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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