SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3824a5945e53afb74ccb423dd5d449e9b93295860a5768c9865df0ff7406edf5' 
  AND token = '8szwiQGqk+CpXglWrieIO9Lu633ps/YrMwNLyOIptX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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