Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f93fdfe0ee73b076d59202e44684206fb5fb0029d225522e2eac41d075fb4a3' 
  AND token = 'TGBhw4XVUeVy1SPc5Ty2A2J/tVQj0YHUwFY3QbY83WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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