Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d42675a8c6dd637d00ae50db8c96f1371e593095c6ccacd4df09e3785e08afd' 
  AND token = 'WeOHCfr0dopqDdbYECB3MVvn9MNxyuIfwKWHQ3VyxrU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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