SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9754774e45120658bed69936986cdea0e6a879f50a00f1d4f95f72a562783d82' 
  AND token = 'KBGSjJf7by8DSonytqcO235PqYDZEjq9qzwZwmCVHFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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