Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbb358c960eb00e4e022ad48cc3136de886341aaf309a4c575db9620689ae9ea' 
  AND token = 'AWT5DmFAUvi3G1WfGb9fjg+WJdf0vE6EHTOnn8CRjaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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