SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cb35072144fa2992645fd48a17e7357e5b3e9acb33bc744b6520c69facdeff3' 
  AND token = 'xSonFBpamJ8d6zH/wSNQhjxDULaZhvHn0mMvCDekODc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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