Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1175e1d3891e7a784c0ce43e70aa80b5217f69b4265f7d944285e596ce691dd' 
  AND token = 'lBua0WuzkoZf3Apz8HXEBEGyPuXZ/MZ6+gszMzSvLEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}