Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '429f6911644b325782c76ac25db566fc82ea6be7a89ad625d76fdf43f6af3bea' 
  AND token = 'ePbrOGfM22rEiTWYBEXmgBjt4hftrwHsIic25+A0DOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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