Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e91a9da4a471dceae200cb7da022345b7d18df0d4574271a2640577a5e7c859' 
  AND token = 'J6UqbEeittults2b8BgUtLbxxPuGHdI2SSj/DWIxqqc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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