Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91d018d0aadadb2c5570e338ce8fe0d7f768ca3ae5428af60470a6d2fd731a8c' 
  AND token = 'VK7dDQdRNBfz5lxUH7xzyq0RD7Oq5c0B6eqCfizakHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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