SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8134ffa9a51e47f3e55c7276a79e200e20b449e45596e8260d72d67b6c1a4463' 
  AND token = 'vpEY3j4KOhr6pvwAHuxXjOGEXawbdAndAsrqI/B/XjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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