Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca683c718bb9fc03414b15efdac1d350f553f6b51d094a7bb943be8bc3a3c759' 
  AND token = '8b2OcUxuDf8ym18SCowR9nzl6u2MJhdwDkEmf3raRlU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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