Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f9af1cc7178eeee9b45e2ea2f4dd23bdbade3996cd87be12070faec2c946d70' 
  AND token = 'pHE9BHXHa8ybPMOMFwZ6UlRvFQ64JjphmSPYdaunaK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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