Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eb35ab5d22496cea458a0bd13f99519013d057740285a3678e5ab542b81f85d' 
  AND token = 'OQpfEpBQ1I22EugbHPxcwe6qX74BOSVhNPQhz5FgP5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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