Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09870723839b98b5ac5eae5f83b85f2ace6d6f64a489a0ab5f38f6c9a2471d41' 
  AND token = 'nML/Li8ztf9zHeGA20TGV5hQA6/ypW4gOOHuXNtk1Fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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