Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '769e4d0b8a25decff6001585a8acdc2275e001214199bd38964b7a2e404b1ff9' 
  AND token = '/xmhtumadLtNhM39mjtKaGrXOsPVRT5c6P04hYpKhB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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