Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d8d8d54c036608aa2c61b452f9dc17decccf9862d48e0086bc8ad58bce7401f' 
  AND token = 'GqpD0Pi/M47/gjysx2XuBBk7axZ+u/mcaEHKoT5XaTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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