Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '823424385610650562a059ff0b345f0dead1f65a29125744ed39c5bec148039c' 
  AND token = 'Jo4dTppO0aVVKRZoNl+XnsAXE3Msi1Wpp/D3K/qKjdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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