Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ac9fa43d0333c76b3f11fd41d7fb474774d65c60702e323ee8c20b89bbefed3' 
  AND token = 'MI8XIxA/DLxBfRUlJhw6GOS0+iK0XHCBUlx9RbaolAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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