Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8150a9dba3467982d4239245c16e7b84fd26756fea7afb6c588e9a19ec830a48' 
  AND token = 'Gmy2NIBiaAYyL61wF+s/NVDUQ0LDoKtQiype+0ub+n4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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