Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a486bf70e507da9aae8e6c646da07ff642809d8a01a5373e4d7a470bf94a29c7' 
  AND token = '1Z1KsFgwaqpu939WQXcM8KeMPLVKAI+4yYMZkWly2Tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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