Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b8343db60581c2bf3ddd35467a954a5a816d775d2ac02e095c2433bc1264c2a' 
  AND token = 'yS/Sj86KEyAIwHJ1YnyrxOzUiXh3eqbPm1qpn6zNVoA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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