Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '906b7095892e029b0f9564c33b8c3846522d191021a1d8e70b7ee4556bdb6f17' 
  AND token = '3WsnOyiuD0LY7oKgaz3GTjJF37b2GokaAhvujXSGGmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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