Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78279c59b399043d0787eb3fe2ed8b9d5fcf10fa3db0465c7b12868d7f6c46d5' 
  AND token = 'yTkbMitbZPn3NktttCO/FX9nqxuXGqfyJS0U7mRV9mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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