Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e23a5d8c5ad2620b8023b531a6c7e9389556d631fa9b05edf3e0eec6b4a34897' 
  AND token = 'CxmcDmeciGw/kqJTW+TWJl1sNfXyRuQYjCyCtexcxXA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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