Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd909843229ea2fb6d98fc57ba511fb7e7afea422357b4e4c8b8c7c03c636cf6e' 
  AND token = 'RThuvmP1WcBuYysCJhrIhe7P9lqBnRccuNfpP+GwWrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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