SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '35194c5c5f1a000beda2dbafdd46558207b6328156036948fcdcb94cc444bcd7' 
  AND token = 'qK6z8d/yiuMyOdjzSMpnhPCiZBjoH4diCtBwR1h73mQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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