Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61b7dd72b709a2f763741425fc382609ac79abfb25ff5168cd274417c491d9f4' 
  AND token = 'iXmjlwtp1lcq3n/uoRHqiTcW2DANa9L5+sm5U1Xz+d8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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