Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d036e35f6ac6abc106fa459d5b29700f97e7eba2b2db78853bf49f6d3ef1833' 
  AND token = 'eNKTsM2QGODzxDW7UZg0PIGgwSDlJdGIMre58IMxsKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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