Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '431a33805625cea30243ac3dccf3a1b342bdc4d571039363fc229eb8d5459f4f' 
  AND token = '48MDW3lqKmuDPhgri2QCjLc+oaotdjcvnocRGzLfLxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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