Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1b04cbbc803837ef20e39304510623d2f035e8e56b0ad8be59e3ceb2efff5f9' 
  AND token = '916dNLaRdwFVGqA7ZtEKZyyvJdh9GoaheXK+GdEPrgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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