Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1ce0c33a1e0fed7ebbce22a60c459928b3b1cc0e208a7d5207acb6fc37f33a7' 
  AND token = '3Wc2O779gDF9uF3hRSfweun1zAyzvUDi7cpJ0cEeOCg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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