Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd21ef55bb8817dac949c8f8c89d6b4cc90df79e0f72065f2f96318d7d30b953' 
  AND token = 'Pd2SmooPMb4XM9PbG/4H0MI4BjYc9YnJr/8Tc52hnhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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