Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '80e4ee01e65b6b87e729c5cb3a656937bac162dd5f5b9cb5b676ed6ce4058495' 
  AND token = 'APQ+dkEP8UHh/iFGBgDZpSMLdrlzgPntcaHl6MsRDRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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