Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61c6082f675358717f6e9a65e19228008c03f3b0d6ca196e8206827752a10118' 
  AND token = '++poUE7WMSI6MQrp836DoGyg3ObCmH9yu9dEeLGmiHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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