Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f882d2ab7955f6eb96ed6eff348f92cf63d26323997d03c9a631f088fb8db5b' 
  AND token = 'rjWppELXalGjMmANG0kwK9B9wf9vYtv5fO3KveNyO/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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