Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7f84a2373fb701c06013dc081bcef3b26743dbd3490fff4dc7d8496f450343c' 
  AND token = 'yehogvB1luo9IxxRRk3b+ANwv4w7JyUHwAmaSiQu0JY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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