Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ffe77ecee49cae9f681e33dfb607f05201f810f8670a96bdff61b791a7ed97e' 
  AND token = 'YX9t7FJQckIpUVDLBVobyXOjCli4FkabQ091gnZ9mY4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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