Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13448f296d046a54adc3d2c996c7f33cb7663558c3cd4721544997c28e928e37' 
  AND token = 'O0jNQk8jiKVvltWwDakk156xsPtA5vt0zgVOEjtwWRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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