Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a268a373a54dd0a89390d13e7fcb7d69ef3fe3435607a37defdab931dad8454' 
  AND token = 'fMgu5VIRpjRB4tYpdmdzHC/1IdgbwYTsNjadbiNA7KY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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