Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bf806f53f41e4a0f6017ba360e574e1f2a762e889beb7f12dcac001e66e9b27' 
  AND token = 'vVfUlwamLzBNrCEppuGW6SyuOIPJS5ZuaG4l+NedflU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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