Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf730b7db306b0c59bcf1b82527200259c0cf3b946d59db907331f5a41bc4ab1' 
  AND token = 'K2KMwoLdiFgCFfGjmlbi4OuOHYiyFhkuzQZhx87z9rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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