Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cbb7c83b6a002ea4b17d5aad9b0ebabb5bf3dac8c5e4bf9967dea81b561911f' 
  AND token = 'f403sN9RClIMnTjRF2soorND3UdiOMX7/nufIpcPPWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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