Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '487fb51c51c389f786c9c29c1d88d570aa4a51d1a822cba9abc8d19288541f7f' 
  AND token = 'AOEkKH43acc+rBK48M7ZEciTY7OyD3z/WolACkXGadA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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