Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b608a999f76f1356f777c3e3b1f35f499140624d9d1c0871a51940c1af149b7' 
  AND token = 'exEAR+Y+WlcjOTbgfg7AgfuAuKB30nPIapw3sa9HC8E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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