Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31b83466e0407b50b58c5d154baad44037b7f8a61f6ef5be052e3b1e5ba53333' 
  AND token = 'W97XZ8XN+p57SS9SWMiuUCKSVYutx+6BIl6wZw6FzW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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