Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c8dad104425658a4842399ac4cb6ee00ae0897d1b8b2fbb1854acb6059e3bce' 
  AND token = 'UXpzTp+e2vcdW6vMMZe7AgNzu4ajmAWDggyAqgPJKyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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