Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba5c5696f0bfd0f1383c450b7fd4f228af9392afb1d861aa6cb802b645e65e9' 
  AND token = 'QmIldwGBJyGbNKO08MUBZ4NiyC3ArtjO6SuwGrZ2ZpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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