Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54a63787ff42d2b2f652921979b3821a02ba97661fe88ede2e2857d8fae15fa0' 
  AND token = 'Rkyut4KjichbJ+9jR76GBVJu6DJy7tpkovM/3M+p59I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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