Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36e4958dbf05f73107cc59658d032cbaf12aaa069c83bef510c7dc71fb09faa7' 
  AND token = 'JxCfj3EnvrTpjp1Y1faek5V1Ikwskx3fAQh1kCgNjZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}