Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74e77215d195428fe667b50079837fb1b96c4c0a6d3b706bcda685b08f8244ac' 
  AND token = 'ETmjzM8YvM9u3S98LLCs8mzSVqKXkjnG0eXUi0bBOBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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